you need to get a set of gm tall spindels which came on damn near everything in the 70s and then get a set on f body 1LE front rotors, they are 12" and they have a 5 on 4.75 lug pattern like a g body. i have a set of the rotors that are bew and slotted and drilled, i bought them for a 12" ls1 conversion and they would not fit on a g body spindel so i just got a set of the s10 dual piston selead hub spindles. i will sell my 1LE rotors if you want them, they are new in box and i will sell for 80 plus shipping if you want them. you also need new upper control arms for the tall spindels if you go this route.
84 regal getting full frame up into a CUSTOM-nothing stock about it/20s/air ride/shaved everything/dakota digital dash/355 all dressed up, t-type interior, GN hood n spoiler
86 442 t-top-in progress, 350 vortec based/gmpp chevy/KZ200r4, 17 centerlines, resto-mod. saved from being scraped, stock apperance but built drivetrain, nothing that can not be reveresed to original
84 Cutlass calais-blue-305/th350/14" cragar, getting bagged and making it look old school
85 riviera/all factory except 20s
90 eldorado, sky blue, factory moonroof,e&g white top /16" niches and vogues
05 impala-nothing done to it, the other halfs car
01 sierra slt-driver, 20s
27' Baja 250 sport, gen vi 454, crane 731cam,full roller motor, crane ignition, air gap, gil 4" stainless exhaust, too much to list! this is starting to become something crazy!
i am not a purest by any means, anything gm can go in any gm in my opinion, if you dont like my chevy motor in my car then make me a offer i cant refuse, buy it from me and change it